To begin, you need to shuffle the pieces by pressing the SHUFFLE PIECES button. Then you have the challenge of correctly arranging them again. Do that and you'll discover an amazing bit of trivia about this famous picture...

The Javascript code for this game was
developed by a UK internet company called Port80. They'll let you use this code, so long as you don't change their copyright discalimer, and you let them know about your site - they might even give you a free plug like they gave the sites below..